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PRACTICE ANOTHER
A square, single turn wire loop $l = 1.00$ cm on a side is placed inside a solenoid that has a circular cross section of radius $r = 3.00$ cm, as shown in the end view of the figure below. The solenoid is 12.5 cm long and wound with 110 turns of wire.
A square with sides of length $l$ is completely inside of and concentric with a circle of radius $r$.
(a) If the current in the solenoid is 2.30 A, what is the magnetic flux through the square loop?
$1.74e-7$ X
Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. T-m²
(b) If the current in the solenoid is reduced to zero in 2.10 s, what is the magnitude of the average induced emf in the square loop?
$83.3$
x
Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. V